Reddit reviews Protex Through-The-Door Locking Drop Box (WSS-159)

The perfect way to lock and secure cash, keys, mail, car remotes, small envelopes and moreThe slot/opening at the drop door to fit in mails/things is 8 inches;Reinforced double steel door to protect against pryingDesigned to be mounted on a door from the inside with the drop door showing through the outsideRequires cutting a rectangular cutout in the door. Door Clearance - 7-1/8(W) x 6-1/4(H)inch. Drop Opening - 7-3/8(W) x 1-3/8(H)inch (7/8 inch drop clearance)Metal baffle to protect drop opening from fishing. Indoor Use Only!